I can confirm the issue on close distance too. However when further apart it cannot be observed.

To the basics: Reveal sets knowsAbout level to 1 about the target unit.For some reason at close distance for west/the west AI it changes to 4 immediately.This leads to the way quicker turn and engagement reaction of the west AI.

That aside the reveal command needs serious improvements to be a lot more useful. See ref tickets.

@zGuba: I do not thing config inconsistencies are explanation here, as units are very close and easy to recognize.

Debugging has shown a bug introduced when suppressive fire was implemented (rev. 47448, 19.9.2007). As as a result of the bug, unidentified enemy targets were actively watched only for a very brief moment. For some reason this moment was always hit by the west unit, but never by the east one (perhaps somehow related to the order in which AI for "centers" is performed). With this bug fixed, both units react very fast, as expected.

Both units react equally dependent on skill settings.Units respond well even if one is M2 Gunner. Now works at Greater distances.Last I don't know if this is intentional units react even behind buildings previously they reacted very slowly.